250EX Oil smells gassy

[bswag]

Kind of a newbie to the ATV world. I have a 03 Honda TRX250EX runs great but I noticed when checking the oil kind of a gassy smell so I changed oil in the bike a couple months later I notice the same smell back again. Is this normal or something I should worry about?

The bike does do some sitting for 3 or 4 weeks at a time. I dont get to ride nearly as much riding as I would like to anymore.

Thanks

bswag

[m.h.s.c.#527]

does it have a milky texture or a film on top of it when u change it

[bswag]

No I did not notice any milky texture or film. It was just the odder that made me suspicious.

[m.h.s.c.#527]

i believe gas and oil are non soluable so you would see it

[TravEX]

Remember to turn your gas off when transporting and after you get through riding. You're probably getting gas fumes making their way down when it sits for a while. When transporting the needle can wiggle around and let fumes and a little raw gas down the intake and past the rings, leaving a gassy smell.

[Aceman]

I agree. Change the oil so it's fresh and make sure to turn the gas off before you let it sit for long periods. I'll bet this will fix it.

[TravEX]

Originally posted by m.h.s.c.#527
i believe gas and oil are non soluable so you would see it

Ever seen pre-mix?

[m.h.s.c.#527]

yea but i thought that 2 stroke oil was thinner than say 10w-30

[bwamos]

They are both pretroleum products. They will mix perfectly. It is water and oil that don't mix well, and that's where the white sludge comes in.

You could also run a plug chop. It is possible that you are running a bit rich and washing the cylinder walls, causing fuel to mix with the oil. But odds are, as the others said, it's just fuel overflow while transporting.